Re: [opensuse-virtual] Re: KVM weirdness on laptop - Need opnions

Tony Su wrote:

Re -reading my post, there are some small language issues which might make the post unclear, hoping with the following alterations the post might be more clear...

Hello,

Am hoping to get experienced eyes on this to evaluate how much of what I'm seeing is expected and what is not.

System: openSUSE 12.2 Desktop: KDE 4.8 Virtualization: QEMU-KVM Also using graphical virt-manager

Hardware: Laptop with occasionally available WiFi

- I have found that anything configured for bridged networking still requires a wired connection, usually binding to eth0.

- I have found that when any real connection to a Network exists (wireless or wired), if a Host Only network does not exist, then the Guest will be automatically configured to use User Mode Networking <only when the NIC is created>. If any network <is> available, then User Mode Networking no longer is an option initially or later and the virtual NIC is configurable for any available virtual network.

Maybe you should try the "default" virtual network provided by libvirt. For more details, see http://wiki.libvirt.org/page/VirtualNetworking The NAT mode works well for me in similar scenarios. Regards, Jim

- If a Guest is initially created with User Mode Networking and then the Host is disconnected from any and all real physical networks, User Mode Networking will fail with an error "service unavailable, port 5900" which likely means that a VNC connection cannot be made.

- Curiously, working from the previous unbootable Guest(no service unavailable, port 5900 error), if a Host Only network is created and a second virtual network for the new Host Only network is added to the Guest described previously, the Guest VM will boot up and can even be viewed using virt-viewer. But, on closer inspection running ifconfig in the Guest reveals only one working NIC configured with an IP address for the User Mode Network while running ifconfig on the Host reveals that only the Host Only network is running and available. So, of course, Host and Guest cannot communicate using TCP/IP with each other except using virt-viewer (should not work?).

- Have not tried, but am considering the idea of configuring the Host Only network to share the same networkID as the User Mode Network (10.0.2.0/24) but make sure the DHCP ranges are different. Theoretically I think this workaround might work but shouldn't be required.

TIA, Tony

On Mon, Nov 26, 2012 at 8:33 AM, Tony Su wrote:

...

Hello,

Am hoping to get experienced eyes on this to evaluate how much of what I'm seeing is expected and what is not.

System: openSUSE 12.2 Desktop: KDE 4.8 Virtualization: QEMU-KVM Also using graphical virt-manager

Hardware: Laptop with occasionally available WiFi

- I have found that anything configured for bridged networking still requires a wired connection, usually binding to eth0.

- I have found that when any real connection to a Network exists (wireless or wired), if a Host Only network does not exist, then the Guest will be automatically configured to use User Mode Networking <only when the NIC is created>.

- When a physical connection does not exist for a Guest previously created using a NIC configured for User Mode Networking, User Mode Networking will fail with an error "service unavailable, port 5900" which likely means that a VNC connection cannot be made.

- Curiously, even with no physical network connection, if a Host Only network is created and a second virtual network for the new Host Only network is added to the Guest described previously, the Guest VM will boot up (no service unavailable, port 5900 error) and can even be viewed using virt-viewer. But, on closer inspection running ifconfig in the Guest reveals only one working NIC configured with an IP address for the User Mode Network while running ifconfig on the Host reveals that only the Host Only network is running and available. So, of course, Host and Guest cannot

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